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The pseudorapidity ($\eta$) and transverse-momentum ($p_{\rm T}$)distributions of charged particles produced in proton-proton collisions aremeasured at the centre-of-mass energy $\sqrt{s}$ = 13 TeV. The pseudorapiditydistribution in $|\eta|<$ 1.8 is reported for inelastic events and for eventswith at least one charged particle in $|\eta|<$ 1. The pseudorapidity densityof charged particles produced in the pseudorapidity region $|\eta|<$ 0.5 is5.31 $\pm$ 0.18 and 6.46 $\pm$ 0.19 for the two event classes, respectively.The transverse-momentum distribution of charged particles is measured in therange 0.15 $<$ $p_{\rm T}$ $<$ 20 GeV/c and $|\eta|<$ 0.8 for events with atleast one charged particle in $|\eta|<$ 1. The correlation between transversemomentum and particle multiplicity is also investigated by studying theevolution of the spectra with event multiplicity. The results are compared withcalculations from PYTHIA and EPOS Monte Carlo generators.

Pseudorapidity and transverse-momentum distributions of charged particles in proton-proton collisions at $\mathbf{\sqrt{\textit s}}$ = 13 TeV